Rangliste Wasserraketen". Fkpme246a.uni-duisburg.de. 2011-06-21. Archived from the original on 2017-07-31 . Retrieved 2019-04-08. Sample K-6 Events | Science Olympiad". Soinc.org. Archived from the original on 2016-08-02 . Retrieved 2019-04-08. Elev8Eject - The parachute eject mechanism uses a tilt switch to deploy parachutes at apogee, with 0° to 45° launch angles from the vertical. Size: A 7-foot giraffe will be perfect for certain spaces, but other smaller yards may be more suited for one of our micro sprinklers — still guaranteed to deliver big fun. Oleksandr, Zahoruiko. "Фестиваль "Еко-техно-Патріо" E". ueeu.in.ua. Archived from the original on 2015-10-03 . Retrieved 2015-09-21.

Fins - Low-profile detachable fin holders compatible with the nozzle enable you to use either standard fins (included in the HydroLaunch® kit) or build your own with our simple guide. The bottle is partly filled with water and sealed. The bottle is then pressurized with a gas, usually air compressed from a bicycle pump, air compressor, or cylinder up to 125 psi, but sometimes CO 2 or nitrogen from a cylinder are used. Age: Kids' tastes change as they grow. Educational sprinklers are generally designed for babies and toddlers, while older kids may gravitate toward a straight-forward sprinkler with a huge spray. Often the pressure vessel is built from one or more used plastic soft drink bottles, but polycarbonate fluorescent tube covers, plastic pipes, and other light-weight pressure-resistant cylindrical vessels have also been used.